diff --git a/README.md b/README.md
index 3d2d229..ff25873 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ Create a visually appealing poster from your GPX tracks - heavily inspired by ht
 
 
 ## Usage
-First of all, you need directory with a bunch of GPX files (e.g. you can export all your tracks from Garmin Connect with the excellent tool [garmin-connect-export](https://github.com/kjkjava/garmin-connect-export), or use [StravaExportToGPX](https://github.com/flopp/StravaExportToGPX) to convert the activities in a Strava export zip file to GPX).
+First of all, you need directory with a bunch of GPX files (e.g. you can export all your tracks from Garmin Connect with the excellent tool [garmin-connect-export](https://github.com/kjkjava/garmin-connect-export), or use [StravaExportToGPX](https://github.com/flopp/StravaExportToGPX), or use [runtastic](https://github.com/Metalnem/runtastic) to convert the activities in a Strava or Runtastic export zip file to GPX).
 
 You will need a little experience running things from the command line to use this script. That said, here are the usage details from the `--help` flag:
 
@@ -118,6 +118,7 @@ We currently support
 
 - French (`--language fr_FR`)
 - German (`--language de_DE`)
+- Chinese (`--language zh_CN`)
 
 
 ## Setup
diff --git a/gpxtrackposter/calendar_drawer.py b/gpxtrackposter/calendar_drawer.py
index 5094acb..9b2df84 100644
--- a/gpxtrackposter/calendar_drawer.py
+++ b/gpxtrackposter/calendar_drawer.py
@@ -78,9 +78,13 @@ def _draw(self, dr: svgwrite.Drawing, size: XY, offset: XY, year: int):
             (size.y - cell_size * 3 * 12) / 11,
         )
 
+        # chinese weekday key number is the third.
+        keyword_num = 0
+        if locale.getlocale()[0] == "zh_CN":
+            keyword_num = 2
         # first character of localized day names, starting with Monday.
         dow = [
-            locale.nl_langinfo(day)[0].upper()
+            locale.nl_langinfo(day)[keyword_num].upper()
             for day in [
                 locale.DAY_2,
                 locale.DAY_3,
diff --git a/locale/zh_CN/LC_MESSAGES/gpxposter.mo b/locale/zh_CN/LC_MESSAGES/gpxposter.mo
new file mode 100644
index 0000000..838764f
Binary files /dev/null and b/locale/zh_CN/LC_MESSAGES/gpxposter.mo differ
diff --git a/locale/zh_CN/LC_MESSAGES/gpxposter.po b/locale/zh_CN/LC_MESSAGES/gpxposter.po
new file mode 100644
index 0000000..9e6abbd
--- /dev/null
+++ b/locale/zh_CN/LC_MESSAGES/gpxposter.po
@@ -0,0 +1,52 @@
+# Chinese translations for PACKAGE package
+# PACKAGE 软件包的简体中文翻译.
+# Copyright (C) 2019 ORGANIZATION
+# Hong Yi <zouzou0208@gmail.com>, 2019.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"POT-Creation-Date: 2017-01-21 13:30+0100\n"
+"PO-Revision-Date: 2019-07-31 23:02+0800\n"
+"Last-Translator: Hong Yi <zouzou0208@gmail.com>\n"
+"Language-Team: Chinese (simplified)\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Generated-By: pygettext.py 1.5\n"
+"Language: zh_CN\n"
+
+#: src/poster.py:50
+msgid "YEAR"
+msgstr "YEAR"
+
+#: src/poster.py:52
+msgid "ATHLETE"
+msgstr "运动员"
+
+#: src/poster.py:54
+msgid "STATISTICS"
+msgstr "数据"
+
+#: src/poster.py:56
+msgid "Weekly"
+msgstr "周"
+
+#: src/poster.py:57
+msgid "Total"
+msgstr "总"
+
+#: src/poster.py:58
+msgid "Avg"
+msgstr "平均"
+
+#: src/poster.py:59
+msgid "Min"
+msgstr "最少"
+
+#: src/poster.py:60
+msgid "Max"
+msgstr "最多"
+
+msgid "Number"
+msgstr "次数"